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Old 05-04-2017, 01:30 AM
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Join Date: May 2017
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Swapping a 300D IP with a OM606 IP?

Would it be any way possible to swap a 300D IP with a OM606 to make gains in HP? If so, I know there are 6 fuel injectors due to the 6 Cyl. engine of the 606. How would I be able to bypass that with my 5 Cyl. 300D?
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Old 05-04-2017, 01:58 AM
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Join Date: Oct 2013
Location: New Zealand
Posts: 470
300Ds came in 5 and 6 cylinder varieties but assuming yours is 5 like you mentioned you need a 5 cylinder pump as a 6 on a 5 will only be timed correctly on cylinder #1. If your engine is the OM617 then OM60x pumps won't fit on either
1978 300D, 373,000km 617.912, 711.113 5 speed, 7.5mm superpump, HX30W turbo...not yet legal
1984 240TD>300TD 121,000 miles, *sold*
1977 250 parts car
1977 280> 300D - 500,000km+
1999 Hyundai Lantra 1.6

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Old 05-04-2017, 10:42 AM
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Join Date: May 2017
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My 92 300D has the OM602 engine in it.
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Old 05-04-2017, 10:27 PM
Diseasel300's Avatar
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Location: Texas Hill Country
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You cannot use a 6 cylinder pump on a 5 cylinder engine period. The camshaft timing in the pump is wrong and there is no way to "bypass" it to make it work on the 5 cylinder. A 5 cylinder engine requires a 5 cylinder pump.
'11 Honda Accord EX - "The Daily" 64K
'83 500SL Euro - "The Money Pit" 116K
'91 350SD - "The Diseasel Jr." 168K
'86 300SDL - "The Diseasel" 189K (Totaled 1/31/19)
The Diseasel Thread - Everything You Didn't Know You Wanted To Know
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Old 05-24-2017, 08:39 PM
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Location: Bahama/Eno Twp, NC
Posts: 3,256
OM602 should have a M pump, 5.5mm elements. You can buy someone's surplus 6mm M pump elements and have a shop swap them in and calibrate the pump.

It'll run you several hundred dollars all together.
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Old 08-03-2017, 10:52 PM
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Join Date: May 2009
Location: Salt Lake City, UT
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Just get a 605 pump from someone in Europe
1987 300D 180k
1985 300SD 330k Helga
1992 300D Lola 269k- Sold
1986 325 coupe Bessie >300k Original engine(ODO Broke) sold
2006 2500HD Druamax Linda- Tows boat and looks pretty in garage thats about it
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Old 08-04-2017, 02:48 PM
WTB: 94/95 E320 Wagon
Join Date: Oct 2007
Location: Charleston SC
Posts: 2,673
Would be cheaper to add an EGT gauge (which you'd need to do anyway), turn up the turbo boost, and turn up the fuel by adjusting the IP governor. You'd also want to advance the IP timing a bit, maybe advance the camshaft timing a bit as well.

Modest gains are possible for little cost.
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC
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